
from rest_framework import serializers
from django_redis import get_redis_connection
from redis import RedisError
import logging

#日志记录器
logger = logging.getLogger('django')


class ImageCodeCheckSerializer(serializers.Serializer):
    image_code_id = serializers.UUIDField()
    text = serializers.CharField(max_length=4, min_length=4)

    def validate(self, attrs):
        '''对比图片验证码'''
        #取出经过字段校验的数据
        image_code_id = attrs['image_code_id']
        text = attrs['text']

        redis_conn = get_redis_connection('verify_codes')
        image_code_server = redis_conn.get('img_%s'%image_code_id)
        if image_code_server is None:
            raise serializers.ValidationError('无效图片验证码')

        #删除图片验证码
        try:
            redis_conn.delete('img_%s'%image_code_id)
        except RedisError as e:
            logger.error(e)

        image_code_server = image_code_server.decode()
        if image_code_server.lower() != text.lower():
            raise serializers.ValidationError('验证码不正确')
        #校验60秒是否重复发送
        mobile = self.context['view'].kwargs['mobile']
        send_flag = redis_conn.get('send_flag_%s' % mobile)
        if send_flag:
            raise serializers.ValidationError('发送短信验证码过于频繁')


        return attrs